Question

State the law of constant proportion with example

Answer 1

The law of constant proportionwas given by Joseph Louis proust. It says that in a chemical substance (compound) elements are always present in definiteproportion by mass. For example: In a compound such as water the ratio of mass of hydrogen to the mass of oxygen is always 1:8.

Answer 2

The law of constant proportions states that when a compound is broken, the masses of the constituent elements remain in the same proportion. Or, in a chemical compound, the elements are always present in definite proportions by mass.

This means each compound has the same elements in the same proportions, regardless of where the compound was obtained, who prepared it, or its mass.

This law was formulated and proven by Joseph Louis Proust in 1799.